Overall, one in five British adults admit to having had an affair, while a third say they have thought about it. The survey also reveals that, of those who say they have had an affair, only half have stopped at one. A quarter have had two affairs, while 20% have had three or more. 8% have had five or more affairs.

How common is cheating in UK?

In a survey performed by YouGov for The Sun newspaper regarding infidelity statics in the UK, one in five British adults admitted to having had an affair. Of those who have had an affair, only half have stopped at one. 20% have had three or more and 8% have had five or more [5].